Circa 1976 I was doing some audio archival work for Western Electric.  One
of the disks that they wanted transferred to tape was a 16" lateral cut
33.33 inside-start shellac.  It was #d "M64".  The other data (scribed
into  the wax master) indicated the baritone "McGregor" and the date:
October 14, 1924.  I'm assuming that it was an early synchronous test but I
don't recall if the start of the inner-most groove had the arrow that
facilitated lining up the film with the phono arm's pickup.  It's a shame
that I wasn't yet of the mindset to photograph the artifacts with which I
was working.  Perhaps the disk is in the Alcatel - Lucent archives.  I've
posted it without any changes from the signal that I just took off of the
15 ips tape.   The file's a 48K VBR Mp3. If any of you can provide me with
the name of the third song (after "Danny Deever" which is after "On The
Road To Mandalay"), I'd appreciate having that information.  The link is

http://dl.dropbox.com/u/5515971/M64_10-14-24_W-E-16%20inch%20shellac%20test_EMPEA3.mp3

The "M" prefix was used for early Vitaphone production #s, including some
of the shorts that comprised part of the debut program of August, 1926.
Compared to other parties seminal R & D of electrical disk recording,
(putting aside the  very loud level of the surface noise),  this provides a
comparison of the superiority of Western Electric's chain from the
microphone to the cutter.

Somewhere here I have one or two of the very brief Pallophotophone
'Christmas Greetings' that were broadcast by WGY from a (perhaps there was
only one at that time) Pallophotophone.  The source of the audio was a
terribly worn set of 16" lacquers of a  1947 "G.E. Science Forum" program
in which the two recordings were played upon the 25th anniversary of their
original airing.  If I find them, then they'll also be uploaded to DropBox
for you.

Best,
Shiffy